That's the way it worked for me. I had just found a new general practitioner, because my other one was a weirdo. So I made an appointment to get all the usual labs done, physical exam, etc. I had already thought about asking her about a sleep study because of how tired I always was and my husband told me I snored horribly. With some insurance plans you need that referral from your regular doctor, some don't require it. My blood pressure was creeping up to where she wanted to talk about meds, but decided she would wait until after my sleep study to see what happened. (I think it was 158/100 that time). I went to the sleep doctor she arranged for me, and they scheduled me for 2 nights of sleep studies -- the first one to see how I sleep normally, and then if needed, one to try the CPAP and figure out what pressure I needed to keep my airway open.
Just to give you an idea of the huge health ramifications of having untreated sleep apnea, when they took my blood pressure after my first night of sleeping my own normal way, it was 170/120! She said all night long my body was doing the fight or flight response -- WAKE UP AND BREATHE! I went back the very same night for the CPAP test, slept like I had never slept before in my adult life, and when she took my BP it was 128/78. At my last follow-up appt, after 2 months with my own CPAP, my BP was 123/80.
I'm really still in shock about it, and again, I am sorry to keep posting all this stuff, but it kills me to think of the amount of people who go in to their doctor complaining about being tired and having high blood pressure who are given antidepressants and BP pills, when a big part of the solution could just be effective, restorative sleep! I think my situation is very extreme, because my sleep apnea is really almost off the charts severe. But I feel compelled to tell my story whenever I get the chance. I have a whole new life!
Edited to add: Feel free to PM me if you have any questions you don't want to post on the thread.